An officer caught Duffey near Southwest Park Avenue and Main Street. While the officer was taking Duffey into custody, another officer arrived in his patrol car to help, but he left his car in gear when he got out.

The car rolled over Duffey, who was lying on the ground.

Duffey was taken to a hospital. He was later released and taken to the Multnomah County Jail.

Police later determined Duffey had a warrant for his arrest. He faces charges of disorderly conduct and interfering with a police officer.

The Portland Police Bureau's Traffic Division is investigating the incident and will forward results to the Collision Review Board.